Annotation-Based Spring Portlet MVC

Transcription

1 Annotation-Based Spring Portlet MVC John A. Lewis Chief Software Architect Unicon, Inc. Jasig 2010 Conference 8 March 2010 Copyright Unicon, Inc., Some rights reserved. This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. To view a copy of this license, visit

2 Spring MVC Flexible and Lightweight Request-Oriented Web Framework Implements Classic MVC Pattern Model Information to be presented Contract between Controller and View View User interface definition Used to render the Model for display Controller Handles the request and assembles the Model Delegates to service layer for business logic 2

3 Handler Mapping Select Controller Lookup Generate Request Response Dispatcher (Servlet/Portlet) Return ModelAndView Map (Model) viewname Render Lookup View Select View Resolver 3

4 Sample Portlet Application Things we need to do: Get development environment installed Setup Pluto as a Server in Eclipse & start it Import 'spring-portlet-sample' application Create Maven task to build & deploy Build & deploy the sample application Verify that it works in Pluto Explore the web.xml and portlet.xml files 4

5 Annotation-Based Controllers Where to put the logic 5

6 Annotation-Based Controllers New in Spring Framework 2.5! Eliminates need for complex HandlerMapping configuration to deal with navigation via Portlet Modes and Request Parameters Allows related logic to be combined into a single Controller class Will replace the entire Controller hierarchy most capability already supported 6

7 Annotation-Based Controller Beans <context:annotation-config/> <bean class="org.springframework.web.portlet.mvc. annotation.defaultannotationhandlermapping"/> <bean class="org.sample.myviewcontroller"/> <bean class="org.sample.myeditcontroller"/> <bean class="org.sample.myhelpcontroller"/> 7

8 Spring MVC Controller class stereotype for controller classes so they can be found and list model attributes to be stored in the session (command class/method mapping to requests (mode, parameters, bind method params to request bind method params or return values to model method to setup binder for putting form submission into command obj 8

9 Annotation-Based @SessionAttributes("item") public class MyViewController public String listitems(model model) { model.addattribute("items", this.itemservice.getallitems()); return "itemlist"; public String int itemid, Model model) { model.addattribute("item", this.itemservice.getitem(itemid)); return "itemdetails"; }... 9

10 Annotation-Based Controller protected String dateformat(portletpreferences prefs) { return preferences.getvalue("dateformat", itemservice.default_date_format); public void initbinder(portletrequestdatabinder binder, PortletPreferences preferences) { String format = preferences.getvalue("dateformat", ItemService.DEFAULT_DATE_FORMAT); SimpleDateFormat dateformat = new SimpleDateFormat(formatString); binder.registercustomeditor(date.class, new CustomDateEditor(dateFormat, true)); }... 10

11 Annotation-Based Controller Sample src/main/java/ sample/portlet/mybookscontroller.java sample/portlet/bookscontroller.java 11

12 Portlet 2.0 (JSR 286) Support The next generation portlet framework 12

13 Major Changes in Portlet 2.0 Portlet Events (New lifecycle phase!) Resource Serving (New lifecycle phase!) Public Render Parameters Portlet Filters Caching Changes Lots of other minor changes... 13

14 Portlet 2.0 In Spring 3.0 Support for new features of Portlet 2.0 included as part of Spring 3.0 Spring 3.0 released 16 Dec 2009 Primary need is support for four phases: ActionRequest / ActionResponse EventRequest / EventResponse (new!) RenderRequest / RenderResponse ResourceRequest / ResourceResponse (new!) 14

15 Annotations for Portlet 2.0 Elements: name, Elements: name, qname, Elements: windowstate, Elements: id, params 15

16 Portlet 2.0 delete ) public void deleteitem(...) {... reload ) public void reloaddata(...) {... params="action=search") public String displaysearch(...) {... picklist ) public ModelAndView picklist (...) {...} 16

17 Questions & Answers John A. Lewis Chief Software Architect Unicon, Inc. 17